checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
    "http://checkstyle.sourceforge.net/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <property name="fileExtensions" value="java"/>

    <module name="FileTabCharacter"/>

    <module name="SuppressWarningsFilter"/>

    <module name="TreeWalker">

        <module name="SuppressWarningsHolder"/>

        <module name="ImportOrder">
            <property name="option" value="inflow"/>
            <property name="sortStaticImportsAlphabetically" value="true"/>
        </module>

        <module name="AvoidStarImport"/>

        <module name="NeedBraces">
            <property name="allowSingleLineStatement" value="true" />
        </module>

    </module>
</module>